Headphones



FIG. 1 is an isometric view of headphones showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a right side elevational view thereof.

The broken lines in the drawings form no part of the claimed design. 

The ornamental design for headphones, as shown and described. 